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Methods of Separation - Steam Distillation

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Estimated time: 2 minutes
CBSE: Class 12

Key Points: Steam Distillation

Applicable for separation/purification of organic compounds (solids or liquids) that are:

  1. Insoluble in water
  2. Volatile in steam
  3. Have vapour pressure 10–15 mm Hg at 373 K
  4. Contain non-volatile impurities

Organic compound is passed with steam → distils at a temperature below its normal boiling point.

Example: Aniline (b.p. 457 K) purified by steam distillation at 371.5 K.

Other examples: nitrobenzene, bromobenzene, o-nitrophenol, salicylaldehyde, o-hydroxyacetophenone, essential oils, turpentine oil.

Related concepts

  • Methods of Separation - Filtration Method
  • Methods of Separation - Distillation Under Reduced Pressure (Vacuum Distillation)
  • Methods of Separation - Gravitation Method
  • Methods of Separation - Diffusion Method
  • Methods of Separation - Liquefaction Method
  • Methods of Separation - Separation of Constituents of the Mixtures with More than Two Constituent
  • Methods of Separation - Churning Method
  • Methods of Separation - Threshing Method
  • Methods of Separation - Winnowing Method
  • Methods of Separation - Handpicking Method
  • Methods of Separation - Magnetic Separation Method
  • Methods of Separation - Sedimentation Method
  • Methods of Separation - Decantation Method
  • Methods of Separation - Sieving Method
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